package lab01;

/**
 * Created by Adminitrator on 2017/10/8.
 */
public class Text0503 {
    public static void main(String[] args) {
        int n=0,sum=0;
        do {
            n=n+1;
            sum=sum+n;
        }
        while(n<=100);
        System.out.println(sum);
    }
}
